Assoc Prof Ervin Lenzi - Fractional Derivatives, Electrical Impedance, and Anomalous Diffusion

Webinar: Thursday 27 May 2021 10:00 pm Brisbane. Register here.

Abstract: We generally use impedance spectroscopy to characterize the physical and chemical properties of various materials, including dielectric properties of water and other electrolytic solutions and how they interact with electrodes limiting the sample. Here, we present some approaches based on fractional time derivatives used to model the experimental data. We also discuss the importance of the surface nature on the electrical response, e.g., the influence of adsorption and desorption processes and the ionic diffusion dynamics in bulk. Finally, we compare the predictions of these models with experimental data.

Bio: Ervin Kaminski Lenzi is  Associate Professor in the Department of Physics, Universidade Estadual
de Ponta Grossa (Paraná, Brazil) (eklenzi@uepg.br). He received his PhD on theoretical
physics (statistical mechanics) from CBPF - Centro Brasileiro de Pesquisas Físicas (Rio de Janeiro,
Brazil), in 2002. His research interests are in complex systems and stochastic processes, and include
anomalous diffusion processes, usual and fractional diffusion equations, and modern boundary value
problems with applications in liquid-crystalline systems and impedance spectroscopy.